[USRP-users] LFRX antialiasing

Matt Ettus matt at ettus.com
Tue Apr 30 15:38:20 EDT 2013


The LFRX has its own antialiasing.  You don't need to add any unless you
need a much steeper rolloff.

Matt


On Tue, Apr 30, 2013 at 12:31 PM, mepard <mepard at me.com> wrote:

>
> In the "Receive FPGA pipeline overflow?" thread, on Apr 30, 2013, at 12:12
> PM, Marcus D. Leech <mleech at ripnet.com> wrote:
>
> Also, if you aren't band-limiting your input to handily-below the Nyquist
> frequency (50Mhz, in the case of the N210, because the ADC samples at
>  100Msps), then you'll get aliases folded into the signals after they're
> sampled.
>
>
> So we need external filtering for the LFRX board? I knew this was true for
> the BasicRX (1 - 250 MHz), but I had the impression this wasn't necessary
> for the LFRX (0 - 30 MHz).
>
> -Marc
>
>
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>
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